Compatible with what? 1) Try not to use more than one different AV programs on the same system at the same time - unless you know they won't kill each other. 2) There are a couple of dozen of AVs to start with - need links? Pick one - then tell us if it's compatible. I mean there are requirement - and desires. Yes, it happens some can cause problems with other software's performance and/or functionality, starting from browser installations to the operating system.